131123404 has 24 divisors (see below), whose sum is σ = 234266256. Its totient is φ = 64200000.

The previous prime is 131123401. The next prime is 131123411. The reversal of 131123404 is 404321131.

It is not an unprimeable number, because it can be changed into a prime (131123401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60174 + ... + 62314.

It is an arithmetic number, because the mean of its divisors is an integer number (9761094).

Almost surely, 2^131123404 is an apocalyptic number.

It is an amenable number.

131123404 is a deficient number, since it is larger than the sum of its proper divisors (103142852).

131123404 is a wasteful number, since it uses less digits than its factorization.

131123404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131123404 is about 11450.9128020433. The cubic root of 131123404 is about 508.0347331946.

Adding to 131123404 its reverse (404321131), we get a palindrome (535444535).

The spelling of 131123404 in words is "one hundred thirty-one million, one hundred twenty-three thousand, four hundred four".